EP 0415732 A2 19910306 - Piston zeroing device for flowable material dispenser.
Title (en)
Piston zeroing device for flowable material dispenser.
Title (de)
Gerät zur Einstellung der Kolbenposition bei einem Spender für fliessfähiges Material.
Title (fr)
Dispositif de réglage d'un piston pour un distributeur de matériau fluide.
Publication
Application
Priority
US 40028289 A 19890829
Abstract (en)
An adjustable dose dispenser having a measuring chamber of constant cross-section defined in a housing wherein an end of the chamber is selectively placed in communication with a reservoir containing flowable material to fill the chamber and with a passage to discharge material from the dispenser, and including a piston movably mounted in the housing and having an end face located in the measuring chamber so as to define the measuring volume between the piston end face and the end of the chamber. A manually operable drive mechanism is movably carried by the housing and has formations thereon operatively engaging formations on the piston so that upon movement of the drive mechanism the piston end face is moved along the measuring chamber to vary the volume thereof and so that dimensional control of the volume of the measuring chamber is determined by tolerance associated with misalignment of the formations on the piston and drive mechanism. The formations preferably are fine pitch gear teeth, and the piston and drive mechanism are installed in the dispenser in a manner such that the total tolerance associated with the volume of the measuring chamber is defined as the circular pitch of the gear tooth, i.e., the maximum misalignment between the gear teeth on the piston and on the drive mechanism.
IPC 1-7
IPC 8 full level
G01F 11/04 (2006.01); B65D 83/06 (2006.01); G01F 11/14 (2006.01); G01F 11/26 (2006.01)
CPC (source: EP KR US)
B67D 7/02 (2013.01 - KR); G01F 11/14 (2013.01 - EP US); G01F 11/261 (2013.01 - EP US); G01F 11/263 (2013.01 - EP US); G01F 11/268 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0415732 A2 19910306; EP 0415732 A3 19920701; EP 0415732 B1 19980107; AT E161946 T1 19980115; CA 2023671 A1 19910301; CA 2023671 C 20020618; DE 69031890 D1 19980212; DE 69031890 T2 19980730; DK 0415732 T3 19980907; ES 2113853 T3 19980516; IE 903030 A1 19910313; JP 3054428 B2 20000619; JP H03148477 A 19910625; KR 100203668 B1 19990615; KR 910004462 A 19910328; US 4971229 A 19901120
DOCDB simple family (application)
EP 90309431 A 19900829; AT 90309431 T 19900829; CA 2023671 A 19900821; DE 69031890 T 19900829; DK 90309431 T 19900829; ES 90309431 T 19900829; IE 303090 A 19900822; JP 22451490 A 19900828; KR 900013383 A 19900829; US 40028289 A 19890829